package cn.com.headfree.util;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class SaiUtil {
	 /**
	     * 去掉bean中所有属性为字符串的前后空格
	     * @param bean
	     * @throws Exception
	     */
	    public static void beanAttributeValueTrim(Object bean) throws Exception {
	        if(bean!=null){
	            //获取所有的字段包括public,private,protected,private
	            Field[] fields = bean.getClass().getDeclaredFields();
	            for (int i = 0; i < fields.length; i++) {
	                Field f = fields[i];
	                if (f.getType().getName().equals("java.lang.String")) {
	                    String key = f.getName();//获取字段名
	                    Object value = getFieldValue(bean, key);
	                    
	                    if (value == null)
	                        continue;
	                    
	                    setFieldValue(bean, key, value.toString().trim());
	                }
	            }
	        }
	    }
	    
	    /**
	     * 利用反射通过get方法获取bean中字段fieldName的值
	     * @param bean
	     * @param fieldName
	     * @return
	     * @throws Exception
	     */
	    private static Object getFieldValue(Object bean, String fieldName)
	            throws Exception {
	        StringBuffer result = new StringBuffer();
	        String methodName = result.append("get")
	                .append(fieldName.substring(0, 1).toUpperCase())
	                .append(fieldName.substring(1)).toString();

	        Object rObject = null;
	        Method method = null;

	        @SuppressWarnings("rawtypes")
	        Class[] classArr = new Class[0];
	        method = bean.getClass().getMethod(methodName, classArr);
	        rObject = method.invoke(bean, new Object[0]);

	        return rObject;
	    }
	    
	    /**
	     * 利用发射调用bean.set方法将value设置到字段
	     * @param bean
	     * @param fieldName
	     * @param value
	     * @throws Exception
	     */
	    private static void setFieldValue(Object bean, String fieldName, Object value)
	            throws Exception {
	        StringBuffer result = new StringBuffer();
	        String methodName = result.append("set")
	                .append(fieldName.substring(0, 1).toUpperCase())
	                .append(fieldName.substring(1)).toString();

	        /**
	         * 利用发射调用bean.set方法将value设置到字段
	         */
	        Class[] classArr = new Class[1];
	        classArr[0]="java.lang.String".getClass();
	        Method method=bean.getClass().getMethod(methodName,classArr);
	        method.invoke(bean,value);
	    }   
}
